fix #114 upload a folder of more then 100 files

src/FileUpload.vue

@@ -524,12 +524,17 @@ export default {
             ])
           })
         } else if (entry.isDirectory && this.dropDirectory) {
-          entry.createReader().readEntries((entries) => {
           let files = []
+          let dirReader = entry.createReader()
+          let readEntries = () => {
+            dirReader.readEntries((entries) => {
               let forEach = (i) => {
-              if (!entries[i] || (this.maximum > 0 && files.length >= this.maximum)) {
+                if ((!entries[i] && i === 0) || (this.maximum > 0 && files.length >= this.maximum)) {
                   return resolve(files)
                 }
+                if (!entries[i]) {
+                  return readEntries()
+                }
                 this.getEntry(entries[i], path + entry.name + '/').then((results) => {
                   files.push(...results)
                   forEach(i + 1)
@@ -537,6 +542,8 @@ export default {
               }
               forEach(0)
             })
+          }
+          readEntries()
         } else {
           resolve([])
         }